Cowboys owner Jerry Jones hand wrote a letter to Pacquiao ahead of his May 2 fight against Floyd Mayweather, offering his support and telling him that "the Dallas Cowboys are in your corner." The letter was found by ESPN's Dan Rafael in Pacquiao's dressing room.

Pacquiao has fought at the Cowboys home of AT&T Stadium before, and Jones even said last year he wanted the Mayweather-Pacquiao fight to take place there. Jones didn't get his wish, but the long-awaited fight will happen at the MGM Grand in Las Vegas on Saturday.

"Manny, you are a credit to the sport of boxing. The way you conduct yourself speaks volumes about your character! I'm so proud of you—you are so very special. Your fights at our stadium are points of pride for me. Wishing you much success—good luck. The Dallas Cowboys are in your corner!"